1 Samuel 26:3-7
English Standard Version
Chapter 26
3And Saul encamped on the hill of Hachilah, which is beside the road on the east of Jeshimon. But David remained in the wilderness. When he saw that Saul came after him into the wilderness, 4David sent out spies and learned that Saul had indeed come. 5Then David rose and came to the place where Saul had encamped. And David saw the place where Saul lay, with Abner the son of Ner, the commander of his army. Saul was lying within the encampment, while the army was encamped around him.
6Then David said to Ahimelech the Hittite, and to Joab 's brother Abishai the son of Zeruiah, "Who will go down with me into the camp to Saul?" And Abishai said, "I will go down with you."
7So David and Abishai went to the army by night. And there lay Saul sleeping within the encampment, with his spear stuck in the ground at his head, and Abner and the army lay around him.